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3x+4x=17.50
We move all terms to the left:
3x+4x-(17.50)=0
We add all the numbers together, and all the variables
3x+4x-(17.5)=0
We add all the numbers together, and all the variables
7x-17.5=0
We move all terms containing x to the left, all other terms to the right
7x=17.5
x=17.5/7
x=2+2.33333333333/4.66666666667
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